CompatHelper: add new compat entry for "JLD2" at version "0.4" (#121)

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Author: github-actions[bot]

Project.toml

@@ -45,6 +45,7 @@ FileTrees = "0.3"
 FixedPointNumbers = "0.8"
 Flux = "0.12"
 FluxTraining = "0.1, 0.2"
+JLD2 = "0.4"
 LearnBase = "0.3"
 MLDataPattern = "0.5"
 MosaicViews = "0.2"